Form-holder for concrete construction.



J. R. JOHNSON.

FORM HOLDER FOR CONCRETE CONSTRUCTION.

APPLICATION rum) rmm, 1912.

1,048,838. Patented Dec. 31, 1912.

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JOHN RICHARD JOHNSON, OF CHICAGO, ILLINOIS.

FORM-HOLDER FOR CONCRETE CONSTRUCTION.

Specification of Letters Patent.

Patented Dec. 31, 1912.

Application filed February 5, 1912. Serial No. 675,588.

To all whom it may concern:

Be it known that I, JOHN RICHARD JOHN- SON, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inForm-Holders for Concrete Construction, of which the following is aspecification.

This invention relates to a device which is attachable to the lowerflange of ordinary I beams and from which, by means of bolts, the formsfor concrete construction can be supported, while a building is incourse of construction. And the object of this invention is to obtain aholder which is attachable to the lower flange of any ordinary I beam,without requiring holes to be drilled in said flange, and by means ofwhich the form or mold which is required in concrete construct-ion willbe held rigidly in place.

A further object of the invention is to obtain a device by means ofwhich, when a construction is completed, pipes and other articles may besuspended from I beams which are embedded in concrete or covered bytiles and plaster.

In the drawing Figure 1 is an end elevation of a device embodying thisinvention, said device being attached to the lower flange of an I beam,said I beam being shown in section. Fig. 2 is an end elevation of alocking member of the device. Fig. 3 is a top plan view of the lockingmember which is illustrated in Fig. 2. Fig. 1 is a top plan view of theprincipal or base member of the device, and Fig. 5 is a verticalsectional view of the device removed from the I beam on line 55 of Fig.1 viewed in the direction indicated by the arrows.

Similar letters refer to similar parts throughout the several views.

A is an I beam and a, a the lower flanges thereof. B is the base memberof this device, and C is the locking member. The member B is providedwith the lip b which is arranged to engage with one of the flanges ofthe I beam A, as at a, Fig. 1. Base B is also provided with the grooveD. The two sides (Z, d, of groove D are not parallel. The base B is alsoprovided with recess E and the groove F opening thereinto. The groove Fis formed by ribs 7", f, which are integral with the part B. Recess E issufiiciently Wide to receive the head X of the bolt X and the groove Fis sufficiently large to receive the body of said bolt. When the bolt Xis inserted in recess E, the head of said bolt rests on ribs f, f, seeFigs. 1 and l, and said bolt is supported thereby.

The bolt X may be dropped into place in the recess E with the bodythereof in groove F, before the device is attached to the I beam, in themanner hereinafter described, but as itoften occurs that a bolt isrequired to be inserted in place in the device after said device isattached to the I beam I provided for such insertion by extending theribs f, f, to lines f, f, only, thereby removing that part or portion ofsaid ribs which is indicated by the broken lines f, f, Fig. 4.

F, Figs. 4 and 5 is the face of one of the end walls of the recess E,(at the lower edge thereof) which is beveled to permit the insertion ofbolt X when the ribs f, f, are sufficiently long to prevent the removalof said bolt when the body thereof is perpendicular.

The locking member C is provided with the lip b which rests on the upperface ofside a of the lower flange of I beam A; said locking member isalso provided with the rib D which corresponds in shape with the recessD of part B.

By this construction when the part B is in place on the lower flange ofthe I beam as illustrated in Fig. 1 of the drawing, the small end of ribD may be inserted in the large end of the recess D and said lockingmember C driven into place and thereby the device will be firmly securedto the lower flange of the I beam.

G, G, are strengthening flanges used in the larger sizes of the device.

The belt X is an ordinary bolt and maintains a concrete form in positionin the ordinary way.

It is evident that said form may be secured in place so that the lowerface of this device will be in the same plane as the lower face of theconcrete in which the I beam is embedded when desired.

Any number of the devices are used which are required.

By the use of this device the concrete forms can be put in place andfilled with concrete as fast as the I beams are secured in position.

I claim:

A holder provided with a recess to hold the head of a bolt and a grooveto permit the body part of said bolt to move therein, so that said boltis not removable therethe ends of said holder forming the ends of fromWhen said bolt is in a perpendicular said recess, and one of said endsbeveled to position.

permit the insertion of said head in said JOHN RICHARD JOHNSON. recessWhen said bolt is inclined from a per- In the presence of pendicular andsaid body part is in said CHARLES TURNER BROWN,

groove, and said recess and groove arranged CORA A. ADAMs.

Gopiea; of this patent may be obtained for five cents each, byaddressing the Gommissioner of Patents, Washington, D. 0.

